I have found that if I let norton do the suspicious cloud thing and quarantine the update file I can then restore it by clicking on the options link and then clicking on restore and exclude I can then click retry on the Peripedal install menuEvery thing seems to work ok then - I do have to repeat this on every update

I also altered some of the settings in norton to stop it removing Peripedal files when it scans my computer

I reckon the more popular Peripedal becomes the problem will stop as Norton uses community information to recognise dangerous files and has no history of Peripedal as yet